Vertical Venting - Hayward H150FD Service & Installation Manual

VERTICAL VENTING – NEGATIVE PRESSURE
VENT SIzING
Size the vent pipe according to the venting
using single-wall or double-wall (Type B) gas
the size of the vent pipe adapter on the heater
(see Table 6). The maximum vent height can-
not exceed 50 ft. The total lateral (horizontal)
maximum. Single-wall vent may be used in
Double-wall (Type B) vent must be used in non-
conditioned spaces.
VENT TERMINATION
horizontally from a vertical wall or similar obstruction shall terminate not less than 2 ft above any portion
minimum value of H using Figure 5 and Table 7.
Figure 5
Minimum Height from Roof for Vent Cap
Lowest discharge opening
Listed
cap
Listed gas
vent
H (minimum)-
Minimum height from roof
to lowest discharge opening
-
x
12
Roof pitch is x/12
USE ONLY HAYWARD GENUINE REPLACEMENT PARTS
Table 6
Vent Pipe Diameters for
Negative-Pressure Indoor Vent Kits
Indoor Vent Kit
Part Number Heater Model
UHXNEGVT11501
UHXNEGVT12001
UHXNEGVT12501
UHXNEGVT13001
UHXNEGVT13501
UHXNEGVT14001
Height Requirements for Vent Caps
(see Figure 5)
Roof Slope
Flat to 6/12
Over 6/12 to 7/12
Over 7/12 to 8/12
Over 8/12 to 9/12
Over 9/12 to 10/12
Over 10/12 to 11/12
Over 11/12 to 12/12
Over 12/12 to 14/12
Over 14/12 to 16/12
Over 16/12 to 18/12
Over 18/12 to 20/12
Over 20/12 to 21/12
Pomona, CA Clemmons, NC Nashville, TN
Tel: 908-351-5400
Vent Pipe
Diameter
H150FD 6 inch
H200FD 6 inch
H250FD 6 inch
H300FD 8 inch
H350FD 8 inch
H400FD 8 inch
Table 7
Min. Height H from Roof to
Lowest
Discharge Opening
1.0 ft
1.25 ft
1.5 ft
2.0 ft
2.5 ft
3.25 ft
4.0 ft
5.0 ft
6.0 ft
7.0 ft
7.5 ft
8.0 ft
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